You may not notice it, but sea urchins have very thin tube-like suction cup feet, just like their close relative the sea stars. These feet are useful to grasp onto pieces of seashells, pebbles, or seaweed to disguise the sea urchin from other nearby predators. Click on this post to see what eats a sea urchin.
: If one is not getting enough calories from a vegan diet, there are a few ways to remedy that. For example, one can snacks that are between 100 to 200 calories. How Do Vegans Get Protein? : But where do you get your protein? but wheat, oatmeal, or potatoes, we would easily take in more than enough protein.
In rare cases some vegans might not get enough fat or calories to produce adequate amounts of steroid hormones (which are produced from cholesterol). Two studies have shown vegans to have sex hormones on par with meat-eaters (1, 2), but one report showed vegan women to have lower levels of estrogen (3).